Agraffe for piano-fortes



(No Model.)

W. H. IVERS. AGRAPPE FOR PIANO FORTES.

No. 448,046. Patented Mar. 10, 1891.

UNITED STATES PATENT OFFICE.

\VILLIAM H. IVERS, OF DEDHAM, ASSIGNOR TO THE IVERS it POND PIANO COMPANY, OF BOSTON, MASSACHUSETTS.

AGRAFFE FOR PiANO-FORTES.

SPECIFICATION forming part of Letters Patent No. 448,046, dated March 10, 1891.

Application filed October 6, 1890. Serial No. 367,157. (No model.)

To all whom it may concern: The agraffe proper is shown at 2, and very Be it known that I, TILLIAM II. IVERS, a closely resembles a machine-made bolt, con- 5 citizen of the United States, residing at Dedsisting of a lower screw-threaded rod 3 or ham, in the county of Norfolk and State of cylindrical portion to engage in the body of 5 Massachusetts, have invented certain new the piano-forte, while surmounting said rod and useful Improvements in Agraffes for is a head 4, rectangular in cross-section, Piano-Fortes; and I do hereby declare the folthrough which pass one or more wires 5, genlowing to be a full, clear, and exact descriperally two or more in the treble portion, owtion of the invention, such as will enable ing to the small size of the wires.

10 others skilled in the art to which it apper- In Fig. 5 the head of the agraffe is shown tains to make and use the same, reference bewith an enlarged base, while that part which ing had to the accompanying drawings, and supports the wire and serves as a bridge has 6" to figures of reference marked thereon, which its sides located within the said base. As a form a part of this specification. consequence the hammer is prevented from r 5 This invention relates to piano-fortes; and striking the wire at a point in immediate it consists in certain improvements in the proximity to said bridge. To overcome this construction of agraffes, so called, with difficulty I have enlarged the head at of the which this class of musical instruments are agraite to cause the sides (3 of the head, equipped. where the wires enter, to project somewhat 20 The drawings accompanying this specificabeyond the other and lower part of said tion represent, in Figure 1, a plan in part of agraite. Furthermore, to avoid any interfera piano-forte, to which is applied an agraite ence with the hammer, I have undercut or embodying my invention. Fig. 2 represents beveled off, as shown at 7, the lower portions an enlarged view of my improved construcof said sides. In this way the hammers can 25 tion, showing the hammer in dotted lines and be so placed that they strike the wires at illustrating the advantages in its use. Fig. that point which is nearest to the agraife itis a vertical section of that part of the self-a result which cannot be otherwise ob- 8o piano shown in Fig. 1. Fig. L is a plan and tained with the old form of agraffe. elevation of my agraffe. Fig. 5 shows simi- \Vhat I claim is-- 0 lar views of a form now in very general use. 1. An agraffe for piano-fortes, composed of My invention is particularly adapted for an upper head portion and a lower screwuse in grand or square piano-fortes, and this threaded portion, the side of the head at the particular style of agraffe is intended to be point where the wires enter projecting laterapplied in the upper treble. In this part of ally beyond any other part of said agraffe,

5 the instrument the length of the wires is substantially as stated and described.

very short, and accordingly the space is lim- 2. In agraffcs, the combination, with the ited. Hence it is very desirable to have the lower screw-threaded holding portion, of a hammer strike the string as near as possible head provided with transverse holes for the that point where said string enters the head passage of the wire or wires and undercut at 40 of the agraffe. the sides, substantiallyas and forthe purposes It will be understood by those skilled in herein set forth. the art that the agrafie is used as a bridge or 3. An agralie composed of a head part and 9 5 support for such wires as pass through it, a lower holding portion, the head being proand its function is to prevent the vibrations vided with one or more transverse holes and of the wire when struck by the hammer with the sides converging from a point befrom extending beyond the agraffe, which deneath the wires toward the longitudinal axis termines the active part of the wire at this of the agraffe, substantially as described. end; but, as before premised, since the space In testimony whereof I affix my signature in in the upper treble is so very limited, it bepresence of two witnesses.

50 comes necessary to have the hammer strike XVILLIAM H IVERS' the wire in close proximity to the agrafte. Witnesses: To this end I have materially changed the II. E. LODGE, shape of the agraffe-head. FRANCIS O. STANWOOD. 

